Rock and earth drilling machine



(N6 Model.) 3 sheets-'sheen 1. S. W. DOUGLASS. ROCK AND BARTH DRILLING MACHINE No. 443,750.

,Patented Deo. 30, 1890.

w om mm w., mfc-um., Mmmm, n. c.

(No Model.)

3 Sheets-Sheet 2. S. W. DOUGLASS. ROCK AND BARTH DRILLING MACHINE. No. 443,750.

Patented Dec. 30, 1890.

(No Model.) 3 Sheets-heet 3. S. W. DOUGLASS.

ROCK AND EARTH DRILLING MACHINE.

No. 443,750. Pal/naemllsel Deo. 30, 1890.

UNrTnD STATES PATENT Ormea.

SAMUEL lV. DOUGLASS, OF FORT COLLINS, COLORADO, ASSIGNOR TO THE M. C. BULLOCK MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS.

ROCK AND EARTH DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 443,750, dated December 30, 1890.

Application tiled May 3,1888. Serial No. 272,704.. (No model.)

To @ZZ whom, t may concern.-

Be it known that I, SAMUEL W. DOUGLASS, of Fort Collins, in the county of .Larimer and State of Colorado, have invented certain new and useful Improvements in Rock and Earth Drilling Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates te casing-sinking attachments or adj unets for rotary rock and earth drills, and has for its object to provide mechanism for running down a casing for a hole being bored by the same machine, and while the drill is at work or in the hele.

The nature of the invention will be understood from the following description of the accompanying` drawings, and from the appended claims.

Figure l is a vertical section through the axis of the drill-spindle of a differentiallygeared screw-feed, as used in rotary rock and earth drills, said section being taken in a plane parallel with the face of the swivelplate and showing the screw-threaded drillspindle and two parallel screw-threaded auxiliary spindles for driving and feeding the casing, together with the casing-chuck and the connecting-gearing. Fig. 2 is a vertical section taken through the axis of the drill feeding and driving spindle at right angles to the face of the swivel-plate. Fig. 3 is a horizontal section taken in the line 3 3 of Figs. l and 2. Fig. 4: is asection in the saine plane as Fig. 2 of the vertically-sliding casing-chuck and its guide. Fig. 5 is ahorizontal section ot' the casing chuck and its guide in the line 5 of Figs. l and 4.

A represents the hollow screw -threaded drill-driving spindle of arotaryrock or earth drill provided with a feather-way a.

A is the drill-rod, held in the hollow spindle A in the usual or any approved manner.

B is a sleeve loosely embracing the spindle A, and provided with a beveled pinion B at its lower end.

C is the beveled driving gear-wheel on the crank-shaft C of the engine and meshing with the beveled pinion B on the sleeve B.

D is a sliding clutch-sleeve embracing the spindle A and provided with a feather or spline d, which runs in the feather-way a of the spindle A. The upper end of the clutchsleeve D is provided with projections d d', which interlock with similar projections D on the lower end of the gear-sleeve B.

D is a collar fitted to an annular groove (Z2 in the clutch-sleeve, and connectedl with a lever D2 for raising and lowering the clutchsleeve.

E is the swivel-plate, whichin the usual or any suitable manner is rotatably supported about the axis of the driving-shaft C', and carries the bearing-blocks F F ofthe drillspindle A and of the auxiliary spindles G G for driving the casing-chuck, yet to be described. In the upper bearing-block F rotates the gear-sleeve B, being constructed to retain its engagement with the driving-gear C by annular flanges c c, as shown, while in the lower bearing-block F rotates the thrustnut O, which is interiorly threaded to it the drill-spindle A, and constituting a feed-nut for said spindle. The thrust-nut O is retained in the bearing-block by suitable anges or other form of shoulders, which in the present instance consist of the familiar roller thrustbearing Q and the annular flange 0. The thrust-nut O carries a loose pinion U and a fixed pinion R. The gear-sleeve B carries the two fixed pinions L and S.

The two auxiliary spindles G G are placed one at each side of the drill-spindle A and preferably in the same plane therewith, and are provided with feather-ways, as shown in Fig.' 3, in which fit feathers or splines on the prolonged sleeves G2, which sleeves themselves rotate in the bearing-block F. Upon each of the sleeves Ggis fitted a loose pinion M or M', which, however, may be made fast with the sleeve by means of any suitable clutch, the form of clutch here shown being the familiar cup friction-clutch, of which G3 is themovable part, being provided with the groove g for the usual collar (not shown) for throwing the clutch into and out of engagement. The pinions M M engage with the pinion L on the sleeve B.

P P are sleeve-nuts, which are interior-ly threaded to t the thread on the spindles G IOO G and rotate in bearings in the lower bear ing-block F. On the lower prolonged ends of the slee've-nntsP Pare fixed pinions 'l T, which mesh with the loose pinion l.' on the sleeve-nut (l. 'lhe nuts Pl are Afor the purpose of feeding the easing-spindles G fl.

The lower ends of the spindles G G rotate in thrust-bearings I l in the verticallymovable yoke or cross-head X, being provided withflanges .f/ g or otheiI provision for imparting end-thrust from the spindles tothe yoke, by which the latter may be suspended and .raised or lowered by vertical movement of said spindles. Above .the bearings I I', here arranged, the spindles G- are provlded with tixed pinions ll ll. XVithin the yoke X rotates the hollow casing-chuck J, which is supported by said yoke and has its axial openingy/l in line with the drill-spindle A,and is provided with gear-teeth K, in position to mesh with the pinions ll ll', so that the chuck may receive its rotary motion from power imparted on opposite sides of it by said spindles. The easing-chuck .l maybe contrived to hold a casing-tube J by any suitable means, such means being here shown as consisting of set-screws'j.

Two counter-shafts are employed, one to rotate the feed-nut of the drill-spindle and the other to rotate the :feed-nuts of the casing-spindles. As here shown, these two coun` ter-shafts lV and V are arranged one within the other directly in front of the drill-spindle A, the shaft 'Wbeing hollow and containing the shaft Y. rlhc shaft W is supported in suitable bearings in the blocks FF,wl1ich project centrally for this purpose, as shown in Figs. 2 and Il. The shat't XV is provided with suitable flanges 1l' te, by which to retain it vertically in place, and it carries the pin ions M2 and U at its opposite ends in position to engage, respectively, with the pinions L and U on the gear-sleeve B and sleeve-nut O. The counter-shaft XV is also divided between its bearings, and its proximate ends are provided with clutch members V, one of which is movable and splined to the sleeve, the devices for actuating the same being of the usual form and not herein shown. In the concentric arrangement shown the interior counter-shaft V (here also shown as tubular) projects beyond the tubular shaft T at both ends, and at its projecting` ex- `tremities carries pinions S and R at the top and bottom, respectively. rlhe former of these pinions is adapted to be engaged with or disengaged from the shaftV at pleasure by any suitable means, represented in this instance by a vertically-movable key Y', iitted to drop into the end of the tube V, and provided with a tang or feather tr, which, reaching through a slot `c in the tube, engages in anotch or feather-way s in the inner periphery of the pinion. The pinion is shown provided with an annular recess s for half its depth, and the feather t is also made half or less than half the depth of the pinion, so that by lilting the key only halt the height of the pinion it may be made to elearthe `featherway and release the pinion'. This construction permits the presence of the retaining nut Y?. The lower pinion R on the countershalt Y is 'fast on said shaft.

The pinions S and l" are made changeable, or, in other words, are adapted to be removed and replaced with pinions of ditierent relative sizes to vary the relative speeds of the gear-sleeve 13 and the counter-shaft Y.

The operation of the machine thus equipped is as follows: Rotation of the shaft C by the engine rotates the gear sleeve B, which, through the splined clutch D, rotates the drill-spindle A. Through the pinions S S it also rotates the eounter-shaft lhe counter-shaft Y, through the pinions R and R, rotates the thrust-nut O, which feeds the drill-spindle A at a rate due to the relative numbers of teeth in the pinjons S, S, R', R, and the pitch of the thread on the spindle; The sleevegear ll also, through the pinions L and ill M', (when the latter are clutcheth) rotates the splined sleeves G2, which turn the spindles G and G, and these spindles, through the pinions ll Il', give a rotary motion to the casingchuck .l and the casingtube J secured therein. The spindles G G are ted by dillerential rotation of the sleeve-nuts l? l, which is accomplished through the pinion U on the counter-shaft lV, the idle-pilr ion Uon the sleeve-nut O, and the pinions l T on the sleeve-nuts l I.

3y the mechanisms above pointed out, connected and operating as described, it is manifest that while the drill-rod A is being run down to form the hole, eitherin rock or earth, the casing-tube J may be at the same time carried down. into the hole as near to or as far from the drillcutters as may be desired, and by change of the gears at a greater or less relative speed. lf the clutch W and the clutches G3 Gi5 be in simultaneous engagement, as eontemplated in ordinary use, the casing-chuck will be gradually fed down as it is being rotated. If the clutch l T be disengaged while the clutches G.3 are retained in engagement, then the casingchuck will continue to rotate, but the feed-n nts l I will be stationary and the casing f chuck will be raised. If thc clutches G be disengaged and the clutch W engaged, the casing will be thrust downward without rotation. By means of the clutch-key Y the pinion S maybe treed from or engaged with the counter-shaft V, through which the feed-nut O is rotated, and, finally, by retracting the clutch l) from engagement with the gear-sleeve B the drill-spindle may be brought to rest while continuing the rotation or lj'ced, or both, of the casing-chuck.

To raise the drilhspindle A, the feed-nut O will be held, lor which purpose the key V will be freed from the pinion S', and to raise the casingspindles G. G the clutch XV will be disengaged and the feed-nuts P P held. To hold these feed-nuts, nolrrotatin g clutches TOO IIO

may be employed such-as are now used in connection with the feed-nuts of drill-spindles, and these devices are therefore not shown.

By changing the combinations of gear- Wheels in an obvious way the rapidity of the feed of both the drill-spindle and the casingspindles may be varied at pleasure, or the casing-chuck can be simply rotated without thrust either way.

It will be observed that the threads on the spindle A are shown left-handed and those on the spindles G G are shown right-handed.

This opposite arrangement of the spindlethreads is to ena-ble the drill and the casingchuck to be raised without reversing the engine, the downfeed being attained by a higher rotary-speed of the feed-nuts than that of the spindles. For the general purposes of my invention I do not wish to be limited to this opposite direction of the threads on the spindles; but such construction is specially claimed as a distinct improvement.

The guide Y maybe attached to the swivelplate or otherwise supported in line with the drill-spindle.

The use of a rotating' screw-threaded drillspindle, a rotating feed-nut thereon, and gear for giving the spindle and feed-nut differentiated motions are not broadly claimed herein.

I do not claim .as my invention the construction herein shown, consist-ing of a drillrod, a casing, gearing which rotates the drillrod in one direction, and gearing which rotates the casing in the opposite direction,this invention, broadly considered, being the invention of another.

I claim as my inventionl. The coinbination,\vith a frame oi swivel plate, a drill-spindle, and driving and feed mechanism for actuating the drill-spindle, of a rotary casing-chuck, a movable support for the casing-chuck, one or more rotating screwthreaded spindles for operating the casingchuck and its support, a feed-nut for advancing the spindles and moving the casing-chuck support, and connecting-gearing between the feed-nut and driving mechanism.

2. The combination, with a frame or swivel plate, a drill-spindle, anddriving and feed mechanism for actuating the drill-spindle, of a rotary casing-chuck, a movable support for the casing-chuck, one or more screw-threaded spindles for operating the casing-chuck and its support, a feed-nut applied to each casingspindle, and clutch-gearing for operating the casing-spindles and their feed-nuts.

3. The combinatioii,witlia frame or swivel plate, a drill-spindle, and driving and feed mechanism for the drill-spindle, of a rotary casing-chuck, a movable support for the casing-chuck, two rotary screw-threaded spindies G G', arranged at opposite sides of the with the casing-chuck, stationary rotatable y feed-nuts embracing the spindles G G' and provided with pinions, clutch-pinions upon the spindles G G', and gearing intermediate ofthe driving mechanism of the drill-spiiidle on the one hand and the casing-spindles and their feed-nuts on the other hand.

Il. The combination, with the drill-spindle A, the driving or gear sleeve B, and the feednut O, of the casing-spindles G G', the tubular countershaft YV, the counter-shaft V within the shaft IV, and the gear-wheels for communicating motion from the gear-sleeve B to the casiiig-spindles and the several feednuts.

5. The combination, with a swivel plate or other support, of a drill-spindle A, gear-sleeve B, provided with pinions L and S, feed-nut O, provided with the fast pinion R and loose pinion U, casing-spindles G G', each pro-- vided with a feather-way and with pinions I-I H', splined sleeves G2, provided with clutchpinions M M', feed-nuts P P', provided with pinions T T', counter-shaft W, provided with pinions M2 and U', and with a clutch intermediate of said pinions, counter-shaft V, provided with pinions S and R' and intermediate clutch mechanism, movable casing-chuck support X, engaged with the spindles G G', and rotating casing-chuck J, provided with gear engaging with the pinions H II', substantially as described.

6. The combination, with a movable casing-chuck support, a rotating casing-chuck mounted in said support, and a spindle or spindles for rotating the chuck, of a guide for the support adapted to hold the latter from rotation while guiding it in line with the drill-spindle.

7. The combination, with a rotating screwthreaded drill-spindle anda rotary feed-nut for advancing and reti-acting the drill-spindle, of rotating screw-threaded casing-spindles which rotate in a direction opposite to that of the drill-spindle, and which have their threads directed oppositely to those of the drill-spindle, rotatable feed-nuts on the casing-spindles, a driving mechanism, and intermediate gearing which gives niotion simultaneously to both the feed-nuts of the drill- `spindle and the feed-nuts of the casing-spindles.

In testimony that I claim the foregoing as my invention I affix my signature in presence of two witnesses.

SAMUEL W. DO U GLASS.

Witnesses:

M. E. DAYTON, TAYLOR E, BROWN,

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